Universal grinding-machine.



F. STUTZMAN. UNIVERSAL GRINDING mom. APPLICATION FILED JUNE 17, 1908.

904,817. Patented Nov. 24, 1908.

2 SHEETS-SHEET 1. V

F/LZ E:

[NI ENTOR /7 SMNBMQ M 2114M & A lwmfi F. STUTZMAN.

UNIVERSAL GRINDING MACHINE.

APPLICATION FILED JUNE 1'7 1908.

Patented NOV. 24, 1908.

2 SHEETS-SHEET 2.

[NI/EN TOR Aflormyo WJYWE it a f a FRANK STUTZMAN, OF WILLIAMSPORT, PENNSYLVANIA.

UNIVERSAL GRINDIN G-MACHIN E Specification of Letters Patent.

Patented Nov. 24, 1908.

Application filed June 17, 1908. Serial No. 439,082.

To all whom it may concern:

Be it known that I, FRANK STLTZMAN, a citizen of the United States, residing at Villiamsport, in the county of Lycoming and State of Pennsylvania, have invented. certain new and useful Improvements in Universal Grinding-h lachines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will. enable others skilled in the art to which it appertains to make and use the same.

My invention consists in the novel features hereinafter described reference being had to the accompanying drawings which illustrate the best form in which I have embodied the invention and said invention is fully disclosed in the following description and claims.

The object of my invention is to provide a grinding mechanism, which is especially adapted for grinding edge. tools such as planer knives having straight, curved or irregular edges, molding and. other special cutters, hollow or other cutting dies, tools, etc, by means of which the machine can be quickly prepared for the work desired of it, and the work can be performed in a very accurate manner and with great economy of time and labor.

In the accompanying drawings, Figure 1 represents a rear elevation of a grinding ma chine embodying my invention. 2 is a detail section on line 22 of Fig. 1 partly broken away. 3 is a front elevation of the upper portion of the machine. Fig. 4- is a top plan view of the machine. Figs. 5 and 6 are detail views of the roller guide or templet holder.

In the machine illustrated in the drawings A represents the main frame, or column which is preferably in the form of an H casting as shown and is provided at its up per end with the table or platen B, having portions extending on opposite sides of the column, and provided with transverse grooves or guide ways, as indicated at Z), to receive the bases of the work supporting slides C, C.

D is the driving shaft which is mounted in bearings (Z (Z, secured in position by set screws (2 cl extending through ears a a. formed on the exterior of the column A, and having tapered ends engaging centers or recesses in the sides of the boxes, thus permitting the boxes to aline themselves when the shaft is placed in the same. The side walls of the column are cored or cut away around the boxes, forming apertures ex tending a distance above the same. The shaft D is provided within the column with a stopped or other driving pulley D and outside of the column the shaft D is provided with the usual fast and loose pulleys D D and are preferably provided with a belt shipping device (not shown) in the usual manner.

Within the column is supported the pivotal grinding frame E, the lower end of which is pivotally mounted in the column in vertical line with and adjacent to the shaft D. To this end the side walls of the column A are provided with inwardly and upwardly extending brackets a a which are conveniently cast integrally therewith, and are provided with set screws a (4 having tapered ends engaging centers or recesses in the edges of the grinding frame as shown in Fig. 1. The heads of the set screws [4 a project into the apertures in the side walls of the column and are accessible for adjustment from the outside by means of a suitable wrench.

The upper end of the grinding frame E is provided with bearings in which is mounted the grinding arbor F provided with the usual collars or other means for carrying one or two (preferably two) emery wheels or other grinding wheels E, E, one of which is removed for greater elearness, in Figs. 1, 3 and 4-.

In order to adjust the grinding wheels positively and accurately with respect to the work the grinding frame is preferably pro vided on one side with an aperture 6, in which is located a nut e pivotally secured therein by pointed set screws 6 engaging centers on opposite sides of the nut, and a screw threaded shaft 6 engages the said nut and has its outer end provided with a hand wheel 6* and an annular groove 6 formed in the shaft or a part secured thereto and adapted to engage projections a a extending below and from the table or platen (see Fig. the shaft being held in engagement with the said projections a by a pin a By removing said pin the screw shaft 0 can be lowered out of engagement with the pro jections a a and the grinding frame can then be moved with respect to the work by hand by means of handles 6 6 on top of the bearings for the arbor F. I prefer to form Cir these handles hollow as shown in Fig. 1 and to provide a passage at the lower end communicating with the bearing. The handles are then filled with cotton waste and oil, and their upper ends are closed by suitable plugs c 0 thus forming large oil cups and insuring the proper lubrication of the arbor F.

I also prefer to provide stops to limit the swing of the grinding frame E. In this instance I have shown the inner side wall of the column provided with brackets (or lugs) a in front and rear of said swinging frame and provided with set screws 64 a thus forming adjustable stops for the swinging frame. The swinging frame E is also provided. on the front side of the machine with projecting studs 6 c which may be used to attach the ordinary work supports adjacent to each of the grinding wheels, for hand grinding, cleaning castings, etc., but these studs may be omitted if desired.

As shown in Figs 1 to 6 inclusive the machine is shown arranged to grind a knife such as a planer knife having a curved and beveled edge. The work supporting or car rier slides C, C are each provided with a slotted base, in the usual manner through which extends a clamping screw 0 having a hand wheel or milled. head for securing the said slides in their adjusted positions. The slides C, C are each provided with vertically disposed posts having a central aperture therein to receive the stem of a work supporting part, which is held in place, after being adjusted vertically by a set screw 0. These carrier slides are adapted to receive the stems or shanks of various work supporting devices as hereinafter described.

As shown in Figs. 1. to 6 inclusive, each of the carrier slides C, C is provided with a pivotally mounted open bearing It, having centers or recesses on opposite sides to receive the pointed ends of set screws h which extend through the opposite arms of a fork 7L2, the stem of which extends into the recess of the slide C and is secured at the desired height by set screw 0. The open bearing h is provided preferably with a V-shaped recess, the wall of the recess farthest from the arbor F being nearly or substantially vertical as indicated in Fig. 2 and a horizontal rod or bar H rests in said open bearings h h so as to be capable of being reciprocated therein by hand (or otherwise). Adjacent to one end of the rod H is an arm h preferably provided with a collar 7? at one end encircling the rod and secured adj ustably thereto by a set screw 7L The outer end of V the arm M is provided with a wide templet engaging surface and I prefer to employ for this purpose a wide faced friction roll 72 as shown.

Beneath the roll 7b is a horizontal guide or templet 71. having a straight upper face and provided with a horizontal supporting arm it terminating in a fork h which embraces the post of the adjacent carrier slide 0, and is secured thereto by set screws 72. The guide if is also provided with a plurality of auxiliary templets or plates, having various configurations, which are pivotally connected to the guide M, by means of a screw or bolt h, and any one of said auxiliary templets can be swung into a substantially horizontal position, so as to project above the straight upper edge of guide h to engage the roller 72., and produce or follow a desired curved or irregular shape of the knife or article being ground. Thus it represents a templet having a convex upper edge which is shown in operative position in the drawings, Figs. 1, 3 and l, for guiding the work in grinding a planer knife having a convex edge. It represents a templet having a concave edge, and h represents a templet having its roll engaging edge partly concave and partly convex, these templets being shown out of operative position in Figs. 1, 3 and a and being shown separated in Fig. 1 for clearness. These templets are illustrated to show examples of forms which can be used but it is obvious that other forms of templets can be employed to guide the roller 71 and rock the shaft l-I during its reciprocating movements to grind a great variety of forms.

L represents the work support proper which consists of a plate secured to and carried by the rod H, and adjustable axially around said shaft and also angularly with respect thereto. In this instance, I have shown a split collar Z encircling said rod H and secured adjustably thereon by a clamping screw Z passing through ears on the collar. The opposite side of the collar is provided with a pair of separated perforated ears Z which receive between them a perforated lug or ear Z cast integrally with or secured to the work support L, and secured in place by a clamping screw or bolt Z thus enabling the support L to be adjusted on the bolt Z as a pivot. The support L is provided with suitable holes or slots, to receive bolts on or screws for attaching the cutter M or other articles to be ground. I may employ more than one work support L if de sired to hold the article to be ground.

It being desired to grind and sharpen a planer knife as M, having a curved and beveled edge, a templet it having a curved upper edge corresponding to that of the cutter is fixer in position as shown and the knife M is secured to the work support L, the support being adjusted to hold the knife in position to produce the desired bevel. It will be seen that a vertical adjustment of the work support can be obtained by raising the forks 72. in the carrier slides and the work support can be ad usted toward and from the wheel if desired by movm sald shdes on the table or platen. When the desired adjustment of the knife M is obtained the rod H is reciprocated endwise carrying the knife M past the emery or other grinding wheel G, and as it reciprocates the roller 7i passing over the templet 7a will rock the rod H thus causing the curved edge to be ground uniformly. "lhe grinding wheel is advanced toward the work by means of the feed screw 0 as before described. It a straight planing knife is to be ground the bolt 71. is loosened allowing the auxiliary templet or templets to fall into inoperative position, and the roller la. is caused to travel on the straight face of the guide or templet 717, thus grinding and beveling the knife in a straight line as will be readily understood.

W hat I. claim and desire to secure by Letters Patent i s 1. in a grinding machine, the combination with the supporting frame, of a swinging frame pivotally connected therewith, an arbor carried by said fame at a distance from. its pivotal connections and provided with means for securing a grinding device thereto, a driving shaft for said arbor, independent of the pivotal connections of said swinging frame work supporting devices and an :uljusting device connected with said swinging frame, and constructed to positively move the grinding devices towardv and from the work, substantially as described.

2. In a grinding machine, the combination with the supporting frame, and a driving shaft mounted therein, of a swinging frame, pivotally connected with the supporting frame a driving shaft, for said arbor, mounted independently of the pivotal connections of said swinging frame an arbor carried by the swinging frame, located at a distance from the pivotal connections thereof and provided. with means for securing a grinding device thereto, work holding de vices, and an adjusting device for connecting the swinging frame, and the main frame for adjusting the grinding devices toward and from the work, said adjusting device being permanently connected to one of said frames and detachably but positively connected to the other substantially as described.

3. In a grinding machine, the combination with the supporting frame, and a driving shaft mounted therein, of a swinging frame, pivotally connected with the supporting frame eccentrically with respect to the driv ing shaft, an arbor carried by the swinging frame, located at a distance from the pivotal connections thereof and provided with means for securing a grinding device thereto, working holding devices, an adjusting device permanently connected to the swinging frame detachable means for positively connecting the said adjusting device to the supporting frame, for moving the grinding device toward and from the Work, means for throw- 1' ing the adjusting device out of operation, and a handle connected with the swinging frame, substantially as described.

a. .lfn a grinding machine, the combination with the supporting frame, of a swinging frame pivotally connected therewith, an arbor carried by said frame, at a distance from its pivotal connections, and provided with means for sccurii'ig a grinding device thereto, driving means for said arbor, work supporting devices and an adjusting screw connected with the swinging frame and with the supporting frame, and having a pivotal relation with one of said parts, and means for throwing said screw out of operative relation with the other of said parts, substantially as described.

5, in a grinding machine, the combination with the supporting frame, of a swinging frame pivotally connected therewith, an arbor carried by said. frame, at a distance from its pivotal connections, and provided with means for securing a grinding device thereto, driving means for said arbor, work support ing devices and a nut pivotally mounted in said swinging frame, an adjusting screw engaging said nut, and having a grooved portion engaging a portion of the supporting frame, and a removable pin for holding said screw in engagement with the supporting frame, substantially as described.

6. in a grindin machine, the combination with the supporting column, of a driving shaft supported in the lower end of the same, a swinging frame provided with centers adjacent to its lower .end, screws passing through portions of said column in line with but at a distance from the driving shaft, and engaging said centers, an arbor carried by the in per end of said swinging frame and provided with means for securing a rotary grinding device thereto, a handle on said swinging frame, adjustable stops for limiting the swing of said frame, work holding devices supported 011 said column, an adjusting screw, for moving the grinding device toward and from the work, said screw having portions engaging the swinging frame and other portions engaging the column, and means for throwing said screw out of operative relation with one of said parts, substantially as described.

7. in a grinding machine, the combination with a supporting frame, a movable frame supported thereby, an arbor carried by said movable frame and provided with means for securing a grinding device thereto, of work supporting devices including a longitudinally movable bar capable of rocking in its supports, a work supporting plate, connected thereto, an arm connected to said bar and extending laterally therefrom, and a stationary guiding device for engaging said arm to govern the position of said work supporting plate with respect to the axis of said bar during-the reciprocation of the bar, substantially as described.

8. In a grinding machine, the combination with a supporting frame, a -movable frame supported thereby, an arbor carried by said movable frame and provided with means for securing a grinding device thereto, of work supporting devices including a longitudinally movable bar capable of rocking in its supports, a work supporting plate connected thereto, an arm connected to said bar and extending laterally therefrom, a roller having a broad face carried by said arm, a plurality of templets or guides located adjacent to said roller, and means for securing one or other of said templets in position to engage said roller, substantially as described.

9. In a grinding machine, the combination with a supporting frame, a movable frame supported thereby, an arbor carried by said movable frame and provided with means for securing a grinding device thereto, of work supporting devices including a longitudinally movable bar capable of rocking in its supports, a work supporting plate connected thereto, an arm connected to said bar and extending laterally therefrom, a roller having a broad facecarried by said arm, a guide having a straight roller engaging face, supported beneath said roller, an auxiliary guide or templet pivotally connected with said guide, and means for securing the same with its roller engaging face in position above the straight face of said guide, sub stantially as described.

10. In a grinding machine, the combina tion with a supporting frame, a movable frame supported thereby, an arbor supported in the movable frame and provided with means for securing a grinding device thereto, and means for driving said arbor, of a pair of supporting bearings secured to the supporting frame, a horizontally disposed rotatable and longltudmally reciproeable bar mounted in said bearings, and provided with a laterally extending controlling arm, a stationary guide for said controlling arm, a work supporting plate mounted on and capable of movement around said bar and means for securing said plate rigidly with respect to said bar, substantially as described.

11. In a grinding machine, the combination with a supporting frame, a movable frame supported thereby, an arbor supported in the movable frame and provided with means for securing a grinding device thereto, and means for driving said arbor, of a pair of supporting bearings secured to the supporting frame, a horizontally disposed rotatable and longitudinally reciprocable bar mounted in said bearings, and provided with a laterally extending controlling arm, a stationary guide for said controlling arm, a collar mounted on said bar and capable of being rotated thereon, locking means for securing the collar to said bar, and a work supporting plate connected to said collar by a vertical pivot, substantially as described.

12. In a grinding machine, the combination with means for a movably supported grinding arbor, provided with means for securing a grinding device thereto, ofa pair of horizontally adjustable carrier slides, yokes having stems adjustable vertically in said slides, a swiveled open bearing carried by each of said yokes, a rotatable and reciprocable bar mounted in said opening bearings, a work supporting plate adjustably secured to said bar, a controlling arm secured to said bar and provided with a friction roller, and a stationary guide engaging said roller, and disposed in a direction parallel to said bar, substantially as described.

In testimony whereof I aflix my signature, in the presence of two witnesses.

FRANK STUTZMAN.

Witnesses WM. P. Powers, E. BATZLE. 

